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dc.contributor.authorHadfield, Jarrod D
dc.contributor.authorBurgess, Malcolm D
dc.contributor.authorLord, Alex
dc.contributor.authorPhillimore, Albert B
dc.contributor.authorClegg, Sonya M
dc.contributor.authorOwens, Ian PF
dc.date.accessioned2017-05-03T15:53:29Z
dc.date.available2017-05-03T15:53:29Z
dc.date.issued2006
dc.date.modified2014-06-27T01:18:46Z
dc.identifier.issn0962-8452
dc.identifier.doi10.1098/rspb.2005.3459
dc.identifier.urihttp://hdl.handle.net/10072/60995
dc.description.abstractIndirect and direct models of sexual selection make different predictions regarding the quantitative genetic relationships between sexual ornaments and fitness. Indirect models predict that ornaments should have a high heritability and that strong positive genetic covariance should exist between fitness and the ornament. Direct models, on the other hand, make no such assumptions about the level of genetic variance in fitness and the ornament, and are therefore likely to be more important when environmental sources of variation are large. Here we test these predictions in a wild population of the blue tit (Parus caeruleus), a species in which plumage coloration has been shown to be under sexual selection. Using 3 years of cross-fostering data from over 250 breeding attempts, we partition the covariance between parental coloration and aspects of nestling fitness into a genetic and environmental component. Contrary to indirect models of sexual selection, but in agreement with direct models, we show that variation in coloration is only weakly heritable (h(2) < 0.11), and that two components of offspring fitness-nestling size and fledgling recruitment-are strongly dependent on parental effects, rather than genetic effects. Furthermore, there was no evidence of significant positive genetic covariation between parental colour and offspring traits. Contrary to direct benefit models, however, we find little evidence that variation in colour reliably indicates the level of parental care provided by either males or females. Taken together, these results indicate that the assumptions of indirect models of sexual selection are not supported by the genetic basis of the traits reported on here.
dc.description.peerreviewedYes
dc.description.publicationstatusYes
dc.languageEnglish
dc.language.isoeng
dc.publisherUnited Kingdom
dc.publisher.placeLondon, England
dc.relation.ispartofstudentpublicationN
dc.relation.ispartofpagefrom1347
dc.relation.ispartofpageto1353
dc.relation.ispartofissue1592
dc.relation.ispartofjournalRoyal Society of London. Proceedings B. Biological Sciences
dc.relation.ispartofvolume273
dc.rights.retentionY
dc.subject.fieldofresearchBiological sciences
dc.subject.fieldofresearchBiological adaptation
dc.subject.fieldofresearchAgricultural, veterinary and food sciences
dc.subject.fieldofresearchBiomedical and clinical sciences
dc.subject.fieldofresearchcode31
dc.subject.fieldofresearchcode310403
dc.subject.fieldofresearchcode30
dc.subject.fieldofresearchcode32
dc.titleDirect versus indirect sexual selection: genetic basis of colour, size and recruitment in a wild bird
dc.typeJournal article
dc.type.descriptionC1 - Articles
dc.type.codeC - Journal Articles
gro.hasfulltextNo Full Text
gro.griffith.authorClegg, Sonya


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